tekmar 257 DHW Control - Manual (Page 8)

© 2009 D 257 - 03/09 8 of 12
DIP Switch Settings
Off | On - Rotate
The Off | On – Rotate DIP switch is used to turn boiler
rotation on or off. When using a single boiler with two
stages, the DIP switch should be in the off (down) position.
When using two single-stage boilers, the DIP switch should
be in the on (up) position.
1
C
Po
Ro
tat
e
On
Off
DHW Control 257
Two Stage
Item
Dat
e Code
1 2 3 4
C R
7
Com
Sen
8
DHW
Sen
No Power
Signal wiring
must be rated
at least 300V
Power Heat 1
5 6
Heat 2
Rotate
On
Off
Control Settings